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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: International Journal of Nano Dimension
- نوع مقاله: Journal Article
- کلمات کلیدی: Shear strength,Sand,viscosity,Silt,Colloidal Nano Silica,injection
- چکیده:
- چکیده انگلیسی: Passive method is a new procedure in stabilizing loose soils. This methodology is a type of interlocking soil particles structures. In order to optimum improve in this method, it is necessary to achieve proper penetration length and increase the shear strength of parameters. Researches have shown an increased resistance to liquefaction and decreased permeability due to colloidal Nano silica injection in soil. In this research, sandy soil was mixed with silt in 5%, 10%, and 15% percent. Then, specimens in dry and saturated conditions were placed under the influence of Nano silica colloid. For determining geotechnical properties of improved specimens, direct shear test was performed in three situations (dry, saturated, and injected). Moreover, for studying drainage condition after stabilizing specimens, constant head, permeability test was carried out. The results showed that geotechnical properties in the injected state increased compared to the non-injected state. Generally, these increase in cohesion and integral friction respectively on average in specimen’s equal 2%, 1.18% and in saturate state equal 1.21%, 1.13%. Besides, with the injection of Nano silica colloid, the amount of vertical settlement in the samples on average 22% decreased. Furthermore, the amount of permeability of the stabilized materials showed on average 58% went down.
- انتشار مقاله: 10-11-1396
- نویسندگان: Ali Kakavand,Rouzbeh Dabiri
- مشاهده
- جایگاه : پژوهشی
- مجله: Advance Researches in Civil Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: embankment,Mechanically Stabilized Walls,Lightweight Expanded Clay Aggregates,Geotextile
- چکیده:
- چکیده انگلیسی: This paper presents the result of an experimental investigation on a full-scale reinforced lightweight aggregate embankment. The reinforced body was expanded clay aggregates, reinforced with geotextile facing. Loadings included self-weight, static surcharge applied using concrete slabs on top of the embankment, and dynamic loads simulated by a vibrator on top of the concrete slabs as well as dropping weight impacts. The system was designed using load and resistance factor design. Measured parameters included lateral and vertical deformations, velocity, and acceleration during tests. This paper covers design and construction details of the built embankment. Results indicate viability of using lightweight expanded clay aggregate in the proposed mechanically stabilized earth walls with geotextile facing as a mean for accelerated construction of bridge abutments.
- انتشار مقاله: 19-06-1397
- نویسندگان: Fariborz Mohammadi Tehrani,Farhad Tizhoosh,Seyyed Mahdi Mousavi,Ali Kavand
- مشاهده